JP2017015849A - Lens drive adapter - Google Patents
Lens drive adapter Download PDFInfo
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- JP2017015849A JP2017015849A JP2015130653A JP2015130653A JP2017015849A JP 2017015849 A JP2017015849 A JP 2017015849A JP 2015130653 A JP2015130653 A JP 2015130653A JP 2015130653 A JP2015130653 A JP 2015130653A JP 2017015849 A JP2017015849 A JP 2017015849A
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- lens
- adapter
- drive
- lens barrel
- driving
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/56—Accessories
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
- G03B3/10—Power-operated focusing
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
- G03B2205/0046—Movement of one or more optical elements for zooming
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
- Structure And Mechanism Of Cameras (AREA)
Abstract
Description
本発明は、レンズ鏡筒に取り外し可能に装着されて該レンズ鏡筒の操作部材を駆動するレンズ駆動アダプタに関する。 The present invention relates to a lens driving adapter that is detachably mounted on a lens barrel and drives an operation member of the lens barrel.
レンズ鏡筒には、ユーザよるマニュアルズーム操作やマニュアルフォーカス操作用の操作リング等の操作部材を備えたものがある。このような操作部材を、アクチュエータを用いて電動駆動するために、レンズ鏡筒の外周に取り外し可能に装着されるレンズ駆動アダプタが提案されている（例えば特許文献１）。 Some lens barrels include operation members such as an operation ring for manual zoom operation and manual focus operation by a user. In order to electrically drive such an operation member using an actuator, a lens drive adapter that is detachably mounted on the outer periphery of the lens barrel has been proposed (for example, Patent Document 1).
しかしながら、特許文献１にて開示されたレンズ駆動アダプタは、これを装着できるレンズ鏡筒の外径が限定される。これに対して、レンズ鏡筒には様々な外径を有するものがあり、これら外径が異なる様々なレンズ鏡筒に対して汎用的に装着できるレンズ駆動アダプタが望まれる。 However, the lens drive adapter disclosed in Patent Document 1 has a limited outer diameter of a lens barrel to which the lens drive adapter can be attached. On the other hand, some lens barrels have various outer diameters, and a lens drive adapter that can be generally used for various lens barrels having different outer diameters is desired.
本発明は、外径が異なる様々なレンズ鏡筒に対して汎用的に装着できるレンズ駆動アダプタを提供する。 The present invention provides a lens drive adapter that can be mounted universally on various lens barrels having different outer diameters.
本発明の一側面としてのレンズ駆動アダプタは、操作部材を備えたレンズ鏡筒に対して取り外し可能に装着される。該レンズ駆動アダプタは、操作部材を駆動する駆動部と、該駆動部を保持するアダプタ本体とを有する。アダプタ本体は、レンズ鏡筒の外周面における周方向２箇所に当接可能な突起形状を有する第１の当接部および第２の当接部を有する。そして、第１および第２の当接部は互いに外径が異なる複数のレンズ鏡筒の外周面のいずれにも当接可能であり、該アダプタは該複数のレンズ鏡筒のいずれに対してもアダプタ本体を固定可能とする固定手段を有することを特徴とする。 The lens drive adapter as one aspect of the present invention is detachably attached to a lens barrel provided with an operation member. The lens drive adapter includes a drive unit that drives the operation member, and an adapter main body that holds the drive unit. The adapter main body includes a first contact portion and a second contact portion having a protrusion shape that can contact two circumferential positions on the outer peripheral surface of the lens barrel. The first and second contact portions can be in contact with any of the outer peripheral surfaces of a plurality of lens barrels having different outer diameters, and the adapter can be in contact with any of the plurality of lens barrels. It has the fixing means which can fix an adapter main body, It is characterized by the above-mentioned.
なお、上記レンズ駆動アダプタが取り外し可能に装着されるレンズ鏡筒を有するレンズ装置および撮像装置も本発明の他の一側面を構成する。 Note that a lens apparatus and an imaging apparatus having a lens barrel on which the lens driving adapter is detachably mounted also constitute another aspect of the present invention.
本発明によれば、外径が異なる様々なレンズ鏡筒に対して汎用的に装着でき、それらレンズ鏡筒の操作部材を確実に駆動可能なレンズ駆動アダプタを実現することができる。 According to the present invention, it is possible to realize a lens drive adapter that can be mounted on a variety of lens barrels having different outer diameters and that can reliably drive the operation members of the lens barrels.
以下、本発明の実施例について図面を参照しながら説明する。 Embodiments of the present invention will be described below with reference to the drawings.
図２には、本発明の実施例であるレンズ駆動アダプタ１と、レンズ駆動アダプタ１が装着された交換レンズ(レンズ装置)の本体を構成するレンズ鏡筒２と、レンズ鏡筒２が装着されたレンズ交換式デジタルカメラ３とを示している。レンズ駆動アダプタ１は、レンズ鏡筒２に対して取り外し可能に装着される。図３には、レンズ駆動アダプタ１がレンズ鏡筒２から取り外され、レンズ鏡筒２がカメラ３から取り外された状態を示している。 In FIG. 2, a lens driving adapter 1 according to an embodiment of the present invention, a lens barrel 2 constituting a main body of an interchangeable lens (lens device) to which the lens driving adapter 1 is mounted, and a lens barrel 2 are mounted. 2 shows a lens interchangeable digital camera 3. The lens drive adapter 1 is detachably attached to the lens barrel 2. FIG. 3 shows a state where the lens driving adapter 1 is detached from the lens barrel 2 and the lens barrel 2 is detached from the camera 3.
図３に示すように、カメラ３はマウント３０１を有し、該マウント３０１に対してレンズ鏡筒２は取り外し可能に装着される。また、カメラ3におけるマウント301の奥には、後述する撮影光学系により形成された被写体像を光電変換(撮像)する撮像素子３０５が設けられている。 As shown in FIG. 3, the camera 3 has a mount 301, and the lens barrel 2 is detachably attached to the mount 301. In addition, an imaging element 305 that photoelectrically converts (captures) a subject image formed by a photographing optical system, which will be described later, is provided behind the mount 301 in the camera 3.
図２および図３に示すレンズ鏡筒２の内部には、複数のレンズ群および絞りを含む撮影光学系２０１が収容されている。一方、レンズ鏡筒２の外周面２０４上には、操作部材としてのレンズ操作リング２０２が設けられている。レンズ操作リング２０２は、レンズ鏡筒２の光軸を中心として回転が可能である。このレンズ操作リング２０２の回転に応じて、撮影光学系２０１に含まれる複数のレンズ群のうちいずれかのレンズ群を光軸に沿った方向（光軸方向）に移動させ、焦点距離を変化させたり焦点調節を行ったりすることができる。 A photographing optical system 201 including a plurality of lens groups and a stop is accommodated in the lens barrel 2 shown in FIGS. On the other hand, a lens operation ring 202 as an operation member is provided on the outer peripheral surface 204 of the lens barrel 2. The lens operation ring 202 can be rotated around the optical axis of the lens barrel 2. In accordance with the rotation of the lens operation ring 202, one of the plurality of lens groups included in the photographing optical system 201 is moved in the direction along the optical axis (optical axis direction) to change the focal length. Or focus adjustment.
レンズ操作リング２０２の光軸方向での一部には、周方向に延びる被駆動部としての被駆動ギア２０３が形成されている。 A driven gear 203 as a driven portion extending in the circumferential direction is formed on a part of the lens operation ring 202 in the optical axis direction.
レンズ駆動アダプタ１において、１０１はアダプタ本体を構成するケースであり、１０２はケース１０１の上面に設けられた操作スイッチである。 In the lens drive adapter 1, 101 is a case constituting the adapter body, and 102 is an operation switch provided on the upper surface of the case 101.
図１には、レンズ駆動アダプタ１とこれが装着されたレンズ鏡筒２をレンズ鏡筒２の光軸に直交する方向に切断したときの断面を示している。 FIG. 1 shows a cross section when the lens driving adapter 1 and the lens barrel 2 to which the lens driving adapter 1 is mounted are cut in a direction perpendicular to the optical axis of the lens barrel 2.
ケース１０１内には、ＤＣモータ、ステッピングモータ、圧電素子等の駆動源１０３と、駆動部材であるリング駆動ギア１０６と、駆動源１０３の駆動力をリング駆動ギア１０６に伝達する伝達ギア１０４とにより構成された駆動部が収容され、かつ保持されている。 The case 101 includes a driving source 103 such as a DC motor, a stepping motor, and a piezoelectric element, a ring driving gear 106 that is a driving member, and a transmission gear 104 that transmits the driving force of the driving source 103 to the ring driving gear 106. The configured drive unit is housed and held.
１０５は駆動制御部であり、操作スイッチ１０２の操作に応じて、駆動源１０３の駆動方向、駆動速度、駆動時間等を制御する。リング駆動ギア１０６は、レンズ駆動アダプタ１がレンズ鏡筒２に装着された状態でレンズ操作リング２０２の被駆動ギア２０３に噛み合う（接触する）。このため、リング駆動ギア１０６が駆動源１０３からの駆動力により回転すると、レンズ操作リング２０２が回転駆動される。 A drive control unit 105 controls the drive direction, drive speed, drive time, and the like of the drive source 103 in accordance with the operation of the operation switch 102. The ring driving gear 106 meshes (contacts) with the driven gear 203 of the lens operation ring 202 in a state where the lens driving adapter 1 is mounted on the lens barrel 2. Therefore, when the ring driving gear 106 is rotated by the driving force from the driving source 103, the lens operation ring 202 is rotationally driven.
なお、本実施例では、駆動部材としてリング駆動ギア１０６を用いているが、駆動部材として、レンズ操作リング２０２に接触してこれを駆動するローラーやベルト等の他の駆動部材を用いてもよい。 In this embodiment, the ring driving gear 106 is used as a driving member. However, another driving member such as a roller or a belt that contacts and drives the lens operation ring 202 may be used as the driving member. .
１０９はバッテリである。なお、レンズ駆動アダプタ１がレンズ鏡筒２やカメラ３から電源供給を受ける場合はバッテリ１０９は不要である。 Reference numeral 109 denotes a battery. Note that the battery 109 is not required when the lens driving adapter 1 receives power supply from the lens barrel 2 or the camera 3.
１０１ａはケース１０１におけるレンズ装着面であり、レンズ鏡筒２の外周面と干渉しないように凹円弧曲面部（凹曲面部）として形成されている。レンズ装着面１０１ａは、レンズ駆動アダプタ１がレンズ鏡筒２に装着されたときにレンズ鏡筒２の外周面２０４に沿う（対向する）面である。以下の説明において、このレンズ装着面１０１ａに沿って配置されるレンズ鏡筒２の周方向に対応する方向を、レンズ駆動アダプタ１でも周方向という。また、レンズ装着面１０１ａに沿って配置されるレンズ鏡筒２の光軸方向に対応する方向を、レンズ駆動アダプタ１でも光軸方向という。 A lens mounting surface 101a in the case 101 is formed as a concave arc curved surface portion (concave curved surface portion) so as not to interfere with the outer peripheral surface of the lens barrel 2. The lens mounting surface 101 a is a surface along (opposing) the outer peripheral surface 204 of the lens barrel 2 when the lens driving adapter 1 is mounted on the lens barrel 2. In the following description, the direction corresponding to the circumferential direction of the lens barrel 2 arranged along the lens mounting surface 101a is also referred to as the circumferential direction in the lens driving adapter 1. The direction corresponding to the optical axis direction of the lens barrel 2 arranged along the lens mounting surface 101a is also referred to as the optical axis direction in the lens drive adapter 1.
１０８ａ，１０８ｂはレンズ装着面１０１ａにおける周方向２箇所に互いに離間して設けられた２つの突起部としての当接部（第１の当接部および第２の当接部）である。これら当接部１０８ａ，１０８ｂはそれぞれ、レンズ鏡筒２の外周面２０４上の当接受け面２０４ａ，２０４ｂに当接可能である。本実施例では、当接部１０８ａ，１０８ｂは、光軸方向に延びる部分円筒面（凸曲面）を有する突起形状に形成されている。 Reference numerals 108a and 108b denote contact parts (first contact part and second contact part) as two protrusions provided at two positions in the circumferential direction on the lens mounting surface 101a so as to be separated from each other. These contact portions 108a and 108b can contact the contact receiving surfaces 204a and 204b on the outer peripheral surface 204 of the lens barrel 2, respectively. In this embodiment, the contact portions 108a and 108b are formed in a protruding shape having a partial cylindrical surface (convex curved surface) extending in the optical axis direction.
当接部１０８ａ，１０８ｂは三角形のような頂点を有する形状に形成されてもよいが、装着時や落下等による衝撃を受けたときのレンズ鏡筒２の外周面２０４の変形を防止するために、先に説明したように部分円筒面を有する形状に形成されることが好ましい。 The abutting portions 108a and 108b may be formed in a shape having a vertex such as a triangle, but in order to prevent deformation of the outer peripheral surface 204 of the lens barrel 2 at the time of mounting or receiving an impact due to dropping or the like. As described above, it is preferably formed in a shape having a partial cylindrical surface.
また、本実施例では、当接部１０８ａ，１０８ｂは、周方向においてリング駆動ギア１０６を間に挟む２箇所に設けられている。 Further, in the present embodiment, the contact portions 108a and 108b are provided at two locations sandwiching the ring drive gear 106 in the circumferential direction.
ここで、本実施例のレンズ駆動アダプタ１は、互いに外周面の外径が異なる複数のレンズ鏡筒に対して装着可能である。図１は、レンズ駆動アダプタ１が、外径がφＡであるレンズ鏡筒２に装着された場合を示している。一方、図４（ａ）には、レンズ駆動アダプタ１が、φＡより小さい外径φＢを有するレンズ鏡筒２′に装着された場合を示している。さらに、図４（ｂ）には、レンズ駆動アダプタ１が、φＡより大きい外径φＣを有するレンズ鏡筒２″に装着された場合を示している。 Here, the lens drive adapter 1 of the present embodiment can be attached to a plurality of lens barrels having different outer diameters on the outer peripheral surface. FIG. 1 shows a case where the lens drive adapter 1 is attached to a lens barrel 2 having an outer diameter of φA. On the other hand, FIG. 4A shows a case where the lens driving adapter 1 is attached to a lens barrel 2 ′ having an outer diameter φB smaller than φA. Further, FIG. 4B shows a case where the lens drive adapter 1 is attached to a lens barrel 2 ″ having an outer diameter φC larger than φA.
図１および図４（ａ），（ｂ）において、１１０ａおよび１１０ｂは、ケース１０１のうち周方向両側の部分に、該ケース１０１に対して移動可能に取り付けられた可動板（第１の可動部材および第２の可動部材）である。可動板１１０ａ，１１０ｂは、これらの図に示したレンズ鏡筒２，２′，２″の外径φＡ，φＢ，φＣに応じて互いに開く方向および閉じる方向に移動可能（回動可能）にケース１０１に取り付けられている。 In FIGS. 1 and 4 (a) and 4 (b), 110a and 110b are movable plates (first movable members) attached to portions on both sides in the circumferential direction of the case 101 so as to be movable with respect to the case 101. And a second movable member). The movable plates 110a, 110b are movable (rotatable) in the opening and closing directions according to the outer diameters φA, φB, φC of the lens barrels 2, 2 ′, 2 ″ shown in these drawings. 101 is attached.
１０７ａおよび１０７ｂはそれぞれ、可動板１１０ａ，１１０ｂにより保持された固定ねじ（１の結合部材および第２の結合部材）である。固定ねじ１０７ａ，１０７ｂは、雄ねじ部１０７ａ１，１０７ｂ１を有する。可動板１１０ａ，１１０ｂと固定ねじ１０７ａ，１０７ｂとにより、ケース１０１を互いに外径が異なる複数のレンズ鏡筒２，２′，２″に対して固定可能とする固定手段が構成される。 Reference numerals 107a and 107b denote fixing screws (one coupling member and a second coupling member) held by the movable plates 110a and 110b, respectively. The fixing screws 107a and 107b have male screw portions 107a1 and 107b1. The movable plates 110a, 110b and the fixing screws 107a, 107b constitute fixing means that can fix the case 101 to a plurality of lens barrels 2, 2 ′, 2 ″ having different outer diameters.
図１および図３に示すように、レンズ鏡筒２の外周面２０４のうち当接受け面２０４ａ，２０４ｂを挟む周方向両側の２箇所の部分には雌ねじ部２１１ａ，２１１ｂが形成されている。固定ねじ１０７ａ，１０７ｂは、その雄ねじ部１０７ａ１，１０７ｂ１が雌ねじ部２１１ａ，２１１ｂに締め込まれることでレンズ鏡筒２に結合される。そして、可動板１１０ａ，１１０ｂにより保持された固定ねじ１０７ａ，１０７ｂをレンズ鏡筒２に結合させることで、ケース１０１（つまりはレンズ駆動アダプタ１）がレンズ鏡筒２に固定される。 As shown in FIGS. 1 and 3, female thread portions 211 a and 211 b are formed at two portions on both sides in the circumferential direction between the contact receiving surfaces 204 a and 204 b of the outer peripheral surface 204 of the lens barrel 2. The fixing screws 107a and 107b are coupled to the lens barrel 2 by fastening the male screw portions 107a1 and 107b1 to the female screw portions 211a and 211b. Then, the case 101 (that is, the lens driving adapter 1) is fixed to the lens barrel 2 by coupling the fixing screws 107a and 107b held by the movable plates 110a and 110b to the lens barrel 2.
また、固定ねじ１０７ａ，１０７ｂを雌ねじ部２１１ａ，２１１ｂに締め込むことで、ケース１０１をレンズ鏡筒２に対して引き寄せる力を発生させることができる。これにより、当接部１０８ａ，１０８ｂがレンズ鏡筒２の外周面２０４上の当接受け面２０４ａ，２０４ｂに押し付けられ、リング駆動ギア１０６とレンズ操作リング２０２の被駆動ギア２０３との噛み合いが維持される。 Further, by tightening the fixing screws 107 a and 107 b into the female screw portions 211 a and 211 b, it is possible to generate a force that pulls the case 101 toward the lens barrel 2. As a result, the contact portions 108a and 108b are pressed against the contact receiving surfaces 204a and 204b on the outer peripheral surface 204 of the lens barrel 2, and the meshing between the ring drive gear 106 and the driven gear 203 of the lens operation ring 202 is maintained. Is done.
なお、本実施例では、結合部材としての固定ねじ１０７ａ，１０７ｂを用いて固定手段を構成しているが、他の結合部材を用いてもよく、望ましくはケース１０１をレンズ鏡筒２に対して引き寄せる力を発生させる構成を有するとよい。 In this embodiment, the fixing means is configured by using the fixing screws 107a and 107b as the coupling members. However, other coupling members may be used, and preferably the case 101 is attached to the lens barrel 2. It is preferable to have a configuration that generates a pulling force.
本実施例において、レンズ駆動アダプタ１の当接部１０８ａ，１０８ｂは、上述したように周方向に離間した２箇所に突起形状を有するように設けられている。レンズ駆動アダプタ１の当接部１０８ａ，１０８ｂは、図１および図４（ａ），（ｂ）に示した互いに外径が異なる複数のレンズ鏡筒２，２′，２″のいずれの外周面２０４（当接受け面２０４ａ，２０４ｂ）にも当接可能である。そして、これら複数のレンズ鏡筒２，２′，２″のいずれの外周面２０４に当接しても、その外周面２０４とレンズ装着面１０１ａのうち当接部１０８ａ，１０８ｂ間の部分との間にギャップＧを形成する。つまり、上記複数のレンズ鏡筒２，２′，２″のいずれの外周面２０４もレンズ装着面１０１ａに当接（干渉）させないように当接部１０８ａ，１０８ｂのレンズ装着面１０１ａからの突出量（高さ）が設定されている。このため、レンズ駆動アダプタ１は、互いに異なる外径の複数のレンズ鏡筒２，２′，２″の外周面２０４のいずれに対しても安定的に（つまりはがたつきなく）装着される。 In the present embodiment, the contact portions 108a and 108b of the lens drive adapter 1 are provided so as to have protrusion shapes at two locations spaced apart in the circumferential direction as described above. The contact portions 108a and 108b of the lens driving adapter 1 are formed on any outer peripheral surface of the plurality of lens barrels 2, 2 'and 2 "having different outer diameters shown in FIGS. 1 and 4A and 4B. 204 (abutment receiving surfaces 204a, 204b) can be brought into contact with any one of the outer peripheral surfaces 204 of the plurality of lens barrels 2, 2 ′, 2 ″. A gap G is formed between the lens mounting surface 101a and the portion between the contact portions 108a and 108b. In other words, the protruding amounts of the contact portions 108a and 108b from the lens mounting surface 101a so that none of the outer peripheral surfaces 204 of the plurality of lens barrels 2, 2 'and 2 "contact (interfere) with the lens mounting surface 101a. Therefore, the lens driving adapter 1 can be stably applied to any of the outer peripheral surfaces 204 of the plurality of lens barrels 2, 2 ′, 2 ″ having different outer diameters ( In other words, it will be worn.
また、図１に示すレンズ鏡筒２において、当接受け面２０４ａ，２０４ｂの曲率半径（つまりはレンズ外周面２０４の半径）Ｒｒは、被駆動ギア２０３の歯先円の半径とほぼ等しく、被駆動ギア２０３のピッチ円の半径Ｒｐよりも若干大きく設定されている。この関係は、図４（ａ），（ｂ）に示したレンズ鏡筒２′，２″においても同じである。このため、レンズ駆動アダプタ１がこれら複数のレンズ鏡筒２，２′，２″のいずれに装着された場合でも、リング駆動ギア１０６とそのレンズ鏡筒の被駆動ギア２０３との軸間距離は大きく変わらず、ほぼ一定となる。このため、レンズ駆動アダプタ１を、これらギア１０６，２０３の噛み合い精度を大きく低下させないように複数のレンズ鏡筒２，２′，２″に装着することができる。 In the lens barrel 2 shown in FIG. 1, the radius of curvature of the contact receiving surfaces 204a and 204b (that is, the radius of the lens outer peripheral surface 204) Rr is substantially equal to the radius of the tip circle of the driven gear 203. It is set slightly larger than the radius Rp of the pitch circle of the drive gear 203. This relationship is the same in the lens barrels 2 'and 2 "shown in FIGS. 4A and 4B. For this reason, the lens drive adapter 1 is connected to the plurality of lens barrels 2, 2' and 2 '. In any case, the distance between the axes of the ring driving gear 106 and the driven gear 203 of the lens barrel does not change greatly, and is almost constant. Therefore, the lens drive adapter 1 can be attached to the plurality of lens barrels 2, 2 ′, 2 ″ so as not to greatly reduce the meshing accuracy of the gears 106, 203.
図５には、本発明の実施例２であるレンズ駆動アダプタ１′とこれが装着されたレンズ鏡筒２をレンズ鏡筒２の光軸に直交する方向に切断したときの断面を示している。本実施例のレンズ駆動アダプタ１′の基本的な構成は実施例１のレンズ駆動アダプタ１と同じであり、実施例１と共通する構成要素には実施例１と同符号を付す。 FIG. 5 shows a cross-section when the lens drive adapter 1 ′ according to the second embodiment of the present invention and the lens barrel 2 on which the lens drive adapter 1 ′ is mounted are cut in a direction perpendicular to the optical axis of the lens barrel 2. The basic configuration of the lens drive adapter 1 ′ of the present embodiment is the same as that of the lens drive adapter 1 of the first embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment.
本実施例では、図５中に破線円で囲んだように、一方の当接部１０８ｂとリング駆動ギア１０６′とが光軸方向に並んで（言い換えれば、当接部１０８ｂの部分円筒面とリング駆動ギア１０６′とが周方向同位置に位置するように）設けられている。 In this embodiment, as surrounded by a broken-line circle in FIG. 5, one abutting portion 108b and the ring drive gear 106 'are aligned in the optical axis direction (in other words, the partial cylindrical surface of the abutting portion 108b and The ring drive gear 106 'is provided at the same position in the circumferential direction).
この構成によれば、レンズ駆動アダプタ１′が図１および図４（ａ），（ｂ）に示した互いに外径が異なる複数のレンズ鏡筒２，２′，２″に装着されても、リング駆動ギア１０６′とそのレンズ鏡筒の被駆動ギア２０３との軸間距離は一定となる。このため、これらギア１０６′，２０３の噛み合い精度を低下させることなく、レンズ駆動アダプタ１′を複数のレンズ鏡筒２，２′，２″に装着することができる。 According to this configuration, even if the lens drive adapter 1 ′ is mounted on the plurality of lens barrels 2, 2 ′, 2 ″ having different outer diameters shown in FIG. 1 and FIGS. 4 (a) and 4 (b), The axial distance between the ring drive gear 106 ′ and the driven gear 203 of the lens barrel is constant, so that a plurality of lens drive adapters 1 ′ can be provided without reducing the meshing accuracy of the gears 106 ′ and 203. The lens barrel 2, 2 ′, 2 ″ can be mounted.
なお、本実施例では、交換レンズとしてのレンズ鏡筒にレンズ駆動アダプタを装着する場合について説明したが、レンズ一体型カメラのレンズ鏡筒にレンズ駆動アダプタを装着することもできる。 In this embodiment, the case where the lens drive adapter is attached to the lens barrel as the interchangeable lens has been described. However, the lens drive adapter can also be attached to the lens barrel of the lens-integrated camera.
以上説明した各実施例は代表的な例にすぎず、本発明の実施に際しては、各実施例に対して種々の変形や変更が可能である。 Each embodiment described above is only a representative example, and various modifications and changes can be made to each embodiment in carrying out the present invention.
１，１′ レンズ駆動アダプタ
１０１ ケース（アダプタ本体）
１０６ リング駆動ギア
１０８ａ，１０８ｂ 当接部
１０７ａ，１０７ｂ 固定ねじ
１１０ａ，１１０ｂ 可動板
２，２′，２″ レンズ鏡筒
２０２ レンズ操作リング
1,1 'lens drive adapter 101 case (adapter body)
106 Ring drive gears 108a, 108b Abutment portions 107a, 107b Fixing screws 110a, 110b Movable plates 2, 2 ', 2 "Lens barrel 202 Lens operation ring
Claims (9)
前記操作部材を駆動する駆動部と、
該駆動部を保持するアダプタ本体とを有し、
前記アダプタ本体は、前記レンズ鏡筒の外周面における周方向２箇所に当接可能な突起形状を有する第１の当接部および第２の当接部を有しており、
前記第１および第２の当接部は、互いに外径が異なる複数のレンズ鏡筒の外周面に対して当接可能であり、
前記複数のレンズ鏡筒のいずれに対しても前記アダプタ本体を固定可能とする固定手段を有することを特徴とするレンズ駆動アダプタ。 A lens drive adapter that is detachably attached to a lens barrel having an operation member,
A drive unit for driving the operation member;
An adapter body for holding the drive unit;
The adapter main body has a first contact portion and a second contact portion having a protrusion shape capable of contacting two circumferential positions on the outer peripheral surface of the lens barrel,
The first and second contact portions can contact the outer peripheral surfaces of a plurality of lens barrels having different outer diameters,
A lens driving adapter comprising fixing means for fixing the adapter body to any of the plurality of lens barrels.
前記駆動部材が、前記第１および第２の当接部の間に配置されていることを特徴とする請求項１から４のいずれか一項に記載のレンズ駆動アダプタ。 The drive unit includes a drive member that transmits a drive force to the operation member,
The lens driving adapter according to any one of claims 1 to 4, wherein the driving member is disposed between the first and second contact portions.
前記駆動部材が、前記第１および第２の当接部のうち一方に対して、該レンズ駆動アダプタが前記レンズ鏡筒に装着された状態での前記レンズ鏡筒の光軸に沿った方向に並んで配置されていることを特徴とする請求項１から４のいずれか一項に記載のレンズ駆動アダプタ。 The drive unit includes a drive member that transmits a drive force to the operation member,
The drive member is in a direction along the optical axis of the lens barrel in a state where the lens drive adapter is attached to the lens barrel with respect to one of the first and second contact portions. The lens drive adapter according to any one of claims 1 to 4, wherein the lens drive adapter is arranged side by side.
前記アダプタ本体の前記周方向の両側に、前記レンズ鏡筒の外周面の外径に応じて前記アダプタ本体に対して移動可能に設けられた第１の可動部材および第２の可動部材と、
それぞれ前記第１の可動部材および前記第２の可動部材により保持され、前記レンズ鏡筒の外周面のうち前記第１および第２の当接部が当接する前記周方向２箇所を挟む前記周方向の両側の部分に結合される第１の結合部材および第２の結合部材とにより構成されていることを特徴とする請求項１から６のいずれか一項に記載のレンズ駆動アダプタ。 The fixing means includes
A first movable member and a second movable member provided on both sides of the adapter body in the circumferential direction so as to be movable relative to the adapter body according to the outer diameter of the outer peripheral surface of the lens barrel;
The circumferential direction that is held by the first movable member and the second movable member and sandwiches the two circumferential directions where the first and second abutting portions abut on the outer peripheral surface of the lens barrel. The lens drive adapter according to any one of claims 1 to 6, comprising a first coupling member and a second coupling member coupled to portions on both sides of the lens.
請求項１から７のいずれか一項に記載のレンズ駆動アダプタが取り外し可能に装着されるレンズ鏡筒とを有することを特徴とするレンズ装置。 An operation member;
A lens apparatus comprising: a lens barrel to which the lens driving adapter according to claim 1 is detachably mounted.
前記レンズ鏡筒に収容された撮影光学系により形成された被写体像を撮像する撮像素子とを有することを特徴とする撮像装置。 A lens barrel provided with an operation member, to which the lens drive adapter according to claim 1 is detachably mounted;
An image pickup apparatus comprising: an image pickup device that picks up a subject image formed by a photographing optical system housed in the lens barrel.
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